Nexen N8000

OK, my xjr still has horrible vibration when driving, had shocks, front vee mounts, all the suspension checked, the cats system checked for any faults, all ok. Been to 3 different dealers and still no luck

The last garage asked about the car history, as I've only had this since last September can only go from the service book. This car appears to have been off the road 4 about 3 years before I got it, the tyres are all about half worn. They suspect possibly the tyres may have been flat for that time.

They checked all the tyres and they look OK but as they can't find anything else with the car suspect the tyres are damaged from being flat for so long.

I've got Pirelli tyres fitted, as you know these aren't cheap, and don't really want to have new tyres fitted for nothing, £870 for 4 of them, so been talking too the tyre fitters and he came up with Nexen N8000, £470 which is better, has any one had these fitted to their's if so what do you think of them